CN1237820A

CN1237820A - Rotor

Info

Publication number: CN1237820A
Application number: CN99106914.5A
Authority: CN
Inventors: G·斯特罗布
Original assignee: Johnson Electric SA
Current assignee: Johnson Electric SA
Priority date: 1998-05-29
Filing date: 1999-05-27
Publication date: 1999-12-08
Anticipated expiration: 2019-05-27
Also published as: BR9901683A; DE69939567D1; EP0961388A2; US6157110A; ES2313771T3; CN1085433C; GB9811457D0; JP2000037060A; EP0961388A3; EP0961388B1

Abstract

A rotor for a fuel pump motor has a rotor. A commutator is located on the shaft adjacent one end of the rotor core. Windings wound around poles of the rotor core are connected to terminals of segments of the commutator. A cover is fitted to the other end of the rotor core covering the ends of the windings protruding from the core. The cover has axially extending legs which are pressed into gaps between adjacent heads of the rotor poles. The commutator has an integral shroud in the form of a radially outer peripheral skirt extending axially from a radial wall of the commutator. A gap is left between the rotor core and the skirt and there are holes in the cover and radial wall of the commutator for the passage of fuel to cool the rotor.

Description

Rotor

The present invention relates to motor, particularly rotor that in the petrolift motor, uses and commutator.The petrolift motor application in vehicle so that fuel is sent to engine from fuel tank.

In the petrolift motor, fuel is by motor, makes motor and pump be immersed in the fuel tank or constitutes the part of fuel conduit, reduced the danger that seepage takes place between pump and motor.Motor is a direct current machine, and it has permanent-magnet stator and wound rotor or armature.Brush and commutator are connected to the winding of rotor on the external power source.Because rotor is immersed in the fuel, so being placed on, attentiveness makes the rotor aerodynamic, to reduce the needed power of physics rotary rotor in fuel, when fuel was more viscous, this required power was more much bigger than the needed power of rotary rotor in air.The difference of doing rotary rotor required drive under the ruuning situation in gentleness is known as punching press loss (punch losses).

For reducing the punching press loss, known method is after rotor has been wound, and comes complete encapsulated rotor by whole molded rotors.From the fluid dynamics viewpoint, this is best solution, but the encapsulation material also heat isolated the rotor winding, cause higher winding temperature and higher fault danger.By using larger-diameter wire can overcome this point, but this can cause motor huge and cost is higher.The cost of whole molded rotors also is a great shortcoming, and has the commutator segment pollution problem.

Another known cost-effective method is a compromise proposal, and one of them outer cover is placed on the rotor tip away from commutator, and it covers the end or the head of the winding that stretches out from this end of rotor core.This end is a front end on the fuel flow direction, and this outer cover has reduced the turbulent flow at rotor front end place.It also allows some fuel to contact with winding by motor, to keep the cooling of rotor core and winding.Yet because the commutator of commutator end connects and winding overhang exposes, the punching press loss is still clearly.

Thereby, needing a kind of petrolift motor rotor, it has reduction and the punching press loss commutator join dependency with suitable cost.

According to first aspect, the present invention provides a kind of commutator for motor line winding rotor; This commutator comprises:

One commutator base;

A plurality of by base support and be fixed on commutator commutator segment on the base, each commutator segment has integral type fluting terminal, is used to receive and clamp rotor winding joint part separately;

One crown, it has a plurality of cavitys, be used to receive the terminal of commutator commutator segment, each cavity has the groove of pair of end portions opening, be used to receive winding joint part separately, it is characterized in that, the commutator base has axially extended annulus, sleeve radially surrounds terminal and forms a cavity, and cavity is used for holding at least in part the axial end portion of crown and winding.

According to second aspect, the present invention comprises for the petrolift motor provides a kind of rotor: an axle; A rotor core, this iron core are fixed on the axle and have a plurality of salient poles; The rotor winding is wrapped on the salient pole and has blank area; One commutator, this commutator is fixed on the axle, and is adjacent with an end of rotor core.This commutator has a commutator base; A plurality of commutator commutator segments and a crown.Commutator segment is fixed on the base, and each commutator segment has the terminal of fluting, is used to receive and clamp rotor winding joint part separately.Crown has a plurality of cavitys that are used for receiving terminal.Each cavity has the groove of pair of end portions opening, this groove receives blank area separately in the winding process of rotor, when being pressed into terminal in the cavity by the motion to axial between commutator base and crown, this groove is also supported blank area separately in the process that terminal and blank area are linked together.The commutator base has axially extended annulus, and sleeve radially surrounds terminal and forms a cavity, and cavity holds the axial end portion of crown and winding at least in part.

Like this, can reduce by the commutator of commutator end and connect and the turbulent flow of winding overhang generation.Because winding is not all to be molded on the rotor core, fuel will pass rotor core and cool off winding.

Advantageously, the commutator base has radial wall, and sleeve extends from the radial outside marginal portion of this wall.Radial wall allows the commutator base to have a plurality of ribs that extend to strengthen sleeve between radial wall and sleeve.

It is desirable to, the quantity of rib is the twice of terminal, and each terminal lays respectively between the adjacent a pair of rib.

For increasing the fuel flow rate by rotor core, radial wall can have one or more holes that are used for by fuel.In fact, an end play can be arranged between sleeve and rotor core, still can reduce turbulent flow to guarantee to have suitable fuel flow rate around the rotor winding.In addition or alternatively, the shape of sleeve can be open.

Advantageously, each commutator commutator segment comprises a conducting metal terminal part, and this conducting metal terminal part partly is embedded in the material with carbon element brush contact portion.This is desirable especially for the fuel with higher alcohol content.

Advantageously, the commutator commutator segment forms a cylindrical sliding contact surface or a planar slide contact surface.

Only by example two preferred embodiments of the present invention are described with reference to the accompanying drawings now, wherein:

Figure 1 shows that according to first embodiment and have the end view of the rotor that uses for the petrolift motor of cylinder form commutator;

Figure 2 shows that from the end-view of Fig. 1 rotor of commutator end observation;

Figure 3 shows that the profile of Fig. 1 rotor;

Figure 4 shows that the amplification profile of the part of Fig. 3 rotor commutator;

Figure 5 shows that the end-view of crown, this crown is the part of Fig. 3 rotor commutator;

Figure 6 shows that the end view that has the rotor that uses for the petrolift motor of plane form commutator according to second embodiment;

Figure 7 shows that from the end-view of Fig. 6 rotor of commutator end observation;

Figure 8 shows that the amplification profile of the base portion of Fig. 6 rotor commutator.

Describe two embodiment now in detail.First preferred embodiment is illustrated in Fig. 1 in Fig. 5, and it is a rotor with cylindrical commutator.Second embodiment is illustrated in Fig. 6 in Fig. 8, and it is a rotor with planar shaped commutator.

Fig. 1 is the end view of preferred rotor, and Fig. 2 is the end-view from the rotor of commutator end observation.Fig. 3 is the longitudinal sectional drawing of Fig. 1 rotor.Rotor 10 has one 12, one rotor core 30, one outer covers, 50, one axle collar 20 and a commutator 60.Axle 12 has drive end 14 and anti-drive end 16.Drive end 14 has keyway or planar section 18, is used to pin the impeller of pump.

Rotor core 30 is laminations of a plurality of punching presses, lamination stack together and utilize interference fit be pressed in the axle 12 on.Lamination is punched down from the thin plate magnet steel.Iron core has a plurality of salient poles 32, is ten here.Each has a radially-protruding handle (shank), supports the head that enlarges.Adjacent head is separated by little gap 36 and is beneficial to twine winding.The handle of consecutive roots constitutes winding tunnel 38, and winding passes this tunnel.

Rotor winding 40 is wrapped on the utmost point 32 of rotor core 30.Winding is the copper wire coil by the varnish coat insulation.Because it forms the electromagnetic field of rotor, so this copper wire is called as magnet-wire.Other insulating material can directly be applied on the rotor core or be applied in iron core and winding between.Winding 40 stretches out from the axial end portion of rotor core 30, and the part of stretching out is called as winding head 42,44.At the drive end of rotor, prevent that by disrance sleeve 22 winding head 42 from directly contacting with axle 12.At the other end, as will be described, support winding head 44 by commutator.

Outer cover 50 is fixed on the drive end of rotor core 30.In Fig. 3, more clearly show the structure of outer cover.Outer cover 50 has the leg 54 of curved top portion 52 and a plurality of axially-extendings, and top 52 has a central through hole.Leg 54 is pressed in the little gap 36 between the adjacent head of the utmost point 32 of rotor core 30.Although this outer cover supports and goes up in position, is provisionally at least, its major function is a closing gap 36 reducing when rotor rotates in fuel, the turbulent flow and the punching press loss that are caused by the gap between the utmost point.Leg 54 is stretched over the total length of similar rotor core 30.Outer cover 50 covers winding head 42 to reduce the resistance of rotor front end at drive end.The axle collar 20 is that on the outer over glaze of outer cover is pressed into cooperation.The axle collar 20 remains in position outer cover 50 by outer cover 50 being clipped on the sleeve pipe 22 and for the thrust bearing (not shown) provides individual closing surface.In Fig. 3, can see two apertures 56 of the close axle collar on the outer cover.These apertures 56 allow some fuel to enter into the inside of outer cover and rotor core with cooling winding 40.

Commutator 60 is installed on the axle 12, and is adjacent with the anti-drive end 16 of rotor core 30.As shown in Figure 2, commutator 60 is cylinder forms, has ten commutator commutator segments 70, and commutator segment is positioned on the outer surface of the cannula-like part that constitutes a commutator part.Can see five apertures 64 at the radially-protruding wall 66 of commutator 60, for passing through fuel.As shown in Fig. 3 and 4, commutator has a crown 80 and supports the base 62 of commutator commutator segment 70.Commutator segment 70 has the material with carbon element body 72 that is molded on the base 62, has the copper of embedding of insulation mechanically moving interconnection system terminal 76 or lead-in wire or the blank area that brass conductive bar 74 is used to be connected to the rotor winding.Each terminal 76 has axially extended groove 78, and when lead-in wire firmly was pressed in the groove 78, groove 78 straddled and clamp lead-in wire.

Crown 80 has integral type sleeve portion 82, and sleeve portion separates crown and rotor core and prevents anti-drive end winding head 44 engagement shafts 12.Crown 80 was fixed on the axle before twining the rotor winding, and sleeve portion 82 abuts against on the rotor core 30.Crown 80 has a plurality of cavitys 84, and cavity holds the terminal 76 of commutator commutator segment.Cavity 84 has the groove 86 that is used for receive leg 46.After crown is fixed on the axle, twine rotor.After rotor had been wound, the base 62 of commutator was crushed on the axle 12, contacted with crown 80, and terminal 76 is received in separately the cavity 84 like this.When terminal was pressed in the cavity, lead-in wire was pressed in the groove, and the insulating barrier of peelling off on lead-in wire and the terminal room contact point place lead-in wire is electrically connected to set up.

One shroud stretches to rotor core 30 from radially-protruding commutator base wall 66.Shroud has radially outward open circumferential sleeve 90, and it covers being connected and being extended to anti-drive end winding head 44 between commutator terminal 76 and lead-in wire.Leave little end play 94 for by being used for the fuel of cooled rotor iron core and winding at 92 of the ends of rotor core 30 and sleeve 90.

Fig. 4 is the amplification profile of the commutator of Fig. 3, and it more clearly represents the end play 94 of 30 of lead-in wire 46 in the groove 78 of terminal and barrel end 92 and rotor cores.Barrel end 92 is tapered, to provide and the little space of 44 on winding head.Can see that sleeve 90 separates to improve fluid dynamics slightly to rotor core 30 directions itself.Crown 80 has the part 88 of expansion in the radially outward open edge of each cavity 84, and this part engages with commutator base 62 in the junction of sleeve 90 and radial wall 66.In stop sleeve 90, the part 88 of this expansion forms an abutment surfaces, is used for the correctly axial and radial location commutator base 62 of relative crown 80.

Fig. 5 is the end-view of commutator assembly crown 80.This view has been represented the single cavity 84 of commutator terminal 76 usefulness.Each cavity 84 is the etui forms that extend radially out and have the opening axial surface that is used for receiving terminal 76 from the crown central point.Each cavity 84 has the transverse groove 86 that is used for receive leg.Cavity 84 be protrude or separate because need a gap between cavity so that can twine winding effectively.When crown 80 rotated in fuel, cavity 84 served as the wheel blade or the blade of centrifugal pump, helped to make fuel to pass through rotor core and/or shroud with cooled rotor.

In use, fuel flows through rotor from impeller, and outer cover 50 is front ends of rotor like this.Because the smooth surface that outer cover and shroud provide, most of fuel will flow through at peritrochanteric with minimum turbulent flow.Indicated as arrow A among Fig. 3, the fuel of a little percentage will flow through the hole 56 on the outer cover, flow along the winding tunnel and flow out by the gap between shroud and rotor core 94.Indicated as arrow B, the fuel of a little percentage also will flow out by 64 inflows of the aperture on the commutator radial wall 66 and by the gap between shroud and rotor core.These two fuel streams are normally assisted by the pumping action of crown cavity, and the rotor core cooling that keeps winding.

With reference now to Fig. 6 to 8, second embodiment is described.Motor has similar structure to the rotor of Fig. 1 and will no longer describe.The part similar to first embodiment has similar reference marker.Fig. 6 is the end view of rotor, and Fig. 7 is the end-view from Fig. 6 rotor of commutator end observation.The difference of commutator 60 is that it is the commutator of a plane form, is also referred to as the panel commutator.As before, commutator 60 has ten commutator segments 70 that are positioned on the commutator base 62, and insulation mechanically moving interconnection system terminal is fixed on (not shown) in the cavity on the crown.In this case, commutator segment is supported by radially-protruding wall 66, rather than is partly supported by the cannula-like of base.

Base 62 combines the integral type shroud, and shroud is radially outward open circumferential sleeve 90 forms, and sleeve extends axially to rotor core 12 from radially-protruding wall 66.Sleeve 90 does not reach rotor core 30 to be provided for the end play 94 by the fuel between shroud and iron core.Sleeve 90 constitutes a cup-shaped shroud, and the inner space of shroud has covered being connected between commutator commutator segment and lead-in wire, and the winding head (not shown) of rotor core commutator end.

In Fig. 7, just can see that tapered slightly sleeve 90 is positioned at the radial outside of ten commutator commutator segments.At the center of commutator, can see the end of the protrusion of axle 12.Adjacent with axle and at the radially inner side of commutator segment 70, three apertures 64 are arranged.These apertures 64 flow into the inner usefulness of shroud for fuel, make fuel stream can cool off winding and rotor core.

Fig. 8 is the profile of the partial graph 6 commutator base portion of not attaching commutator segment, and it has showed that shroud sleeve 90 gives the cup-like shape of base 62.Shown in aperture 64 be with the tunnel that forms in the through hole 68, although substituting or additionally can provide independent through hole at axle as the tunnel fuel is incorporated into the inner space of shroud.Other hole that can see in cross section is used to adhere to the commutator commutator segment.The rib 96 of week expression in sleeve 90 is strengthened sleeve, also as relative crown (not shown) positioning base.The blade that the cavity of rib 96 and crown serves as centrifugal pump passes through outer cover, shroud and rotor core with the cooled rotor iron core with pump fuel.Although can use other terminal cavity and combinations of ribs, think that the quantity that it is desirable to rib is two times of cavity, after base and crown had assembled, cavity was positioned between separately a pair of adjacent rib.In the device process, can utilize rib that terminal is aimed at cavity like this.

Although described the present invention with reference to two preferred embodiments, those skilled in the art will recognize and can carry out multiple modification that all this modification all are included in the scope of the present invention that limits as appended claim.For example, although sleeve is described to not reach rotor core, sleeve can engage and have a plurality of holes that are used for by fuel with rotor core.In fact, for the end of stop sleeve, sleeve can have axially extended finger piece, and finger piece is pressed in the gap between the adjacent head of the utmost point, similar to the leg of outer cover and with its closing.

Claims

1. the winding rotor commutator of a motor; This commutator comprises:

One commutator base;

One crown, it has a plurality of cavitys, is used to receive the terminal of commutator commutator segment, and each cavity has the groove of pair of end portions opening, is used to receive winding joint part separately,

It is characterized in that

The commutator base has axially extended annulus, and this sleeve radially surrounds terminal and forms a cavity, is used for holding at least in part the axial end portion of crown and winding.

2. according to the commutator described in the claim 1, it is characterized in that described commutator base has radial wall, described sleeve stretches out from the radial outside marginal portion of wall.

3. according to the commutator described in the claim 2, it is characterized in that the commutator base has a plurality of ribs that stretch to strengthen sleeve between radial wall and sleeve.

4. according to the commutator described in the claim 3, it is characterized in that the quantity of rib is the twice of terminal, each terminal lays respectively in the middle of the adjacent a pair of rib.

5. according to the commutator described in the claim 2, it is characterized in that radial wall has at least one passage that is communicated with cavity.

6. according to each described commutator in the aforementioned claim, it is characterized in that each commutator commutator segment comprises a conducting metal terminal part, this part partly is embedded in the material with carbon element brush contact portion.

7. according to each described commutator in the claim 1 to 5, it is characterized in that the commutator commutator segment constitutes a cylindrical sliding contact surface.

8. according to each described commutator in the claim 1 to 5, it is characterized in that the commutator commutator segment constitutes a planar slide contact surface.

9. according to each described commutator in the claim 1 to 5, it is characterized in that axially extended annulus opens divergent shape.

10. a petrolift motor rotor comprises

One;

One rotor core, this iron core are installed on the axle and have a plurality of salient poles;

Rotor winding, this winding are wrapped on the salient pole and have blank area;

One commutator, this commutator is fixed on the axle, and is adjacent with an end of rotor core, and commutator has a commutator base; A plurality of commutator commutator segments that are fixed on the base, each commutator segment has the terminal of fluting, is used to receive and clamp rotor winding joint part separately; One crown, this crown has a plurality of cavitys that are used for receiving terminal, each cavity has the groove of pair of end portions opening, this groove receives blank area separately in the winding process of rotor, when being pressed into terminal in the cavity by the motion to axial between commutator base and crown, this groove is also supported blank area separately in the process that terminal and blank area are linked together

It is characterized in that the commutator base has axially extended annulus, sleeve radially surrounds terminal and forms a cavity, and cavity holds the axial end portion of crown and winding at least in part.

11. the rotor according to described in the claim 10 is characterized in that, the commutator base has radial wall, and sleeve stretches out from the radial outside marginal portion of wall.

12. the rotor according to described in the claim 11 is characterized in that, the commutator base has a plurality of ribs that stretch to strengthen sleeve between radial wall and sleeve.

13. the rotor according to described in the claim 12 is characterized in that, the quantity of rib is the twice of terminal, and each terminal lays respectively in the middle of the adjacent a pair of rib.

14. the rotor according to described in the claim 11 is characterized in that, radial wall has at least one passage that is communicated with cavity.

15., it is characterized in that each commutator commutator segment comprises a conducting metal terminal part according to each described rotor in the claim 10 to 14, this part partly is embedded in the material with carbon element brush contact portion.

16., it is characterized in that the commutator commutator segment constitutes a cylindrical sliding contact surface according to each described rotor in the claim 10 to 14.

17., it is characterized in that the commutator commutator segment constitutes a planar slide contact surface according to each described rotor in the claim 10 to 14.

18., it is characterized in that axially extended annulus opens divergent shape according to each described rotor in the claim 10 to 14.

19., it is characterized in that the radial outside of the rotor core adjacent shaft end face on barrel end and opposite, little gap is partly faced according to each described rotor in the claim 10 to 14.